InChI=1S/C22H28O7/c1-6-7-12-9-16(24)28-21-17(12)20-13(10-15(27-20)22(4,5)29-26)19(25)18(21)14(23)8-11(2)3/h9,11,15,25-26H,6-8,10H2,1-5H3